Re: [gentoo-user] Xorg segfaults, but GDM welcome screen loads

[Grant <emailgrant@gmail.com>]

>> Yesterday I caught up with portage and updated quite a few packages on
>> a remote workstation.  The system hadn't been updated for about a
>> month.  The updates included some xorg stuff and some xfce4 stuff.
>> Today when the workstation's user logged in via gdm, she clicked the
>> xfce4 "Migrate Config" option, something weird happened, and she ended
>> up back on the gdm welcome screen.  Now whenever she logs is via gdm,
>> the screen immediately goes black and she is routed back to the gdm
>> welcome screen again.  When I have grsecurity enabled I get this in
>> dmesg:
>>
>> Segmentation fault occurred at 000068e453633fdc in
>> /usr/bin/Xorg[X:4777] uid/euid:0/0 gid/egid:0/0, parent
>> /usr/sbin/gdm-binary[gdm:4775] uid/euid:0/0 gid/egid:1010/1002
>>
>> She also tried skipping gdm and issuing startxfce4 manually but it
>> fails in a similar way and displays "disconnected from session
>> manager".  I get this in Xorg.0.log:
>>
>> Backtrace:
>> [    74.799] 0: /usr/bin/X (xorg_backtrace+0x28) [0x49eeb8]
>> [    74.799] 1: /usr/bin/X (0x400000+0x62849) [0x462849]
>> [    74.799] 2: /lib/libpthread.so.0 (0x64727eac2000+0xf3f0) [0x64727ead13f0]
>> [    74.800] 3: /usr/lib64/xorg/modules/drivers/nv_drv.so
>> (0x64727bed7000+0x112d0) [0x64727bee82d0]
>> [    74.800] 4: /usr/lib64/xorg/modules/libshadowfb.so
>> (0x64727a682000+0x3db2) [0x64727a685db2]
>> [    74.800] 5: /usr/bin/X (0x400000+0x2da29) [0x42da29]
>> [    74.800] 6: /usr/bin/X (0x400000+0x2eda9) [0x42eda9]
>> [    74.800] 7: /usr/bin/X (0x400000+0x2475a) [0x42475a]
>> [    74.800] 8: /lib/libc.so.6 (__libc_start_main+0xe6) [0x64727dcb2ba6]
>> [    74.800] 9: /usr/bin/X (0x400000+0x242f9) [0x4242f9]
>> [    74.800] Segmentation fault at address 0x64727462bfdc
>> [    74.800]
>> Fatal server error:
>> [    74.800] Caught signal 11 (Segmentation fault). Server aborting
>>
>> and when grsecurity is enabled I get this in dmesg:
>>
>> Segmentation fault occurred at 000064727462bfdc in
>> /usr/bin/Xorg[X:4647] uid/euid:1003/0 gid/egid:1010/1010, parent
>> /usr/bin/xinit[xinit:4646] uid/euid:1003/1003 gid/egid:1010/1010
>>
>> I have tried disabling all security options in the kernel but I get
>> the same results with the exception of the dmesg info.  I tried
>> re-emerging xorg-server, xf86-video-nv, xinit, and gdm.  Strangely,
>> after re-emerging xorg-server and xinit there were files to change in
>> etc-update.  I don't see how that's possible since I'm caught up with
>> emerge -DuN world.  revdep-rebuild comes up with nothing.  I'm running
>> an emerge -e world now.  It's weird that the gdm welcome screen will
>> load (which implies xorg) but nothing afterward.  Any ideas?
>>
>> - Grant
>>
>
> Please try to run
> `strace startx`
> and post the output as a file attachment.

Another question, is there anything I need to prepare to make sure the
strace works?

- Grant